What is the area of 100ft, 80ft, 140ft

Mathematics

1 answer:

Dahasolnce [82]2 years ago

8 0

Area or volume??????????????????????????????????????

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Solve the system 2x + 2y equals -6 and 3x - 2y equals 11 What is the solution to the system

ivann1987 [24]

Answer:

Step-by-step explanation:

(1,-4) is the answer reason why is you add the equations in order to solve for the first variable plug it in the equations in order to solve for the remaining variables

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A sign next to a roller coaster at an amusement park says, “You must be at least 60 inches tall to ride.” Noah is happy to know

gtnhenbr [62]

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x>60 or x=60

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The must be 60 or more inches.

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A random sample of 28 fields of spring wheat has a mean yield of 44.7 bushels per acre and standard deviation of 6.96 bushels pe

Bingel [31]

Answer:

$44.7-2.052\frac{6.96}{\sqrt{28}}=42.001$

$44.7+2.052\frac{6.96}{\sqrt{28}}=47.399$

And the confidence interval would be between 42.001 and 47.399

Step-by-step explanation:

Information given

$\bar X=44.7$ represent the sample mean for the sample

$\mu$ population mean

s=6.96 represent the sample standard deviation

n=28 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=28-1=27$

The Confidence interval is 0.95 or 95%, the significance is $\alpha=0.05$ and $\alpha/2 =0.025$ ,the critical value for this case would be $t_{\alpha/2}=2.052$